Safe-lock



UNITED STATES PATENT OFFICE.

I JOHN T. HOUGH, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF IO JOHN A. HARPER, OF PITTSBURG, PENNSYLVANIA. l

SAFE-LOCK.

SPECIFICATION forming part of Letters Patent No. 294,625, dated March 4, 1884.

yApplication filed September 18, 1BF3. (No model.)

drilled through the parts surrounding the lock,

whereby the lock-bolt is movedy so as to form a recess for the connecting-bolt to pass into.

l`o this end my invention consists in the construction and combination of parts hereinafter set forth, and pointed out in the claims. Referring to the drawings, Figure lis a front elevation of an ordinary combination-lock with my invention attached. Fig. 2 is a similar view, showing the connection with the boltwork. Fig. 3 is asectional view of the lock and spindle. Fig. 4 is an end elevation of the 'same parts with the detachable lock-bar in place. Fig. 5 is a detail edge and face elevation of the ,grooved nut upon the lock-spindle. Fig. 6 is a View of the sliding bolt lwith its locking-pin.

Ain said drawings represents a combinationlock, wherein c is the lock spindle, and c the lock-bolt, having a recess, c2, to receive the bolt b, which connects with the bolt-work'B.

To thebolt-work B are attachedthe locking- 35 bolts B in the usual manner. To one of said bolts is pivoted an arm of a bell-crank, b, mounted at its angle upon a stationary pivot, b2, and having its other end pivoted to a vertically reciprocating bolt, C, moving in keepers 1 l, and having a lip, c, which is adapted for a purpose presently to be described.

D represents a bolt sliding in' keepers 2 A2, and having a lug, d, to which is connected a spiral spring, d', by whchthe bolt is normally thrown forward, its arrangement being such that when the bolt C is vraised,by throwing the locking-bolts B forward to secure the door, -it will pass under lthe lip c and` prevent the retraction of the bolts B.

5o E representsadetachable lock-bar, having its upper end pivoted to the bolt D, and fulcrumed at a point not far from its center upon a stud, e. Y It extends down to a point just' above the lock-spin dle a, and its lower end is provided with-a fork having its arms e e projecting below and upon each side of the lockspindle,which is carried through the lock and projects from its rear side. Upon this portion of the lock-spindle is placed anut, F, having a groove, f, within which the forked end of the 6o lock-bar is placed. i Upon the top of the lock A,and behind the look-bar E, is placed a keeper, G, having a notch, g, and the lock-bar is so arranged that at all ordinary times it rests against the solid 6 5' endg of the keeper,thereby retracting the bolt D against the tension ofthe spring d and holding it permanently in that position, as shown' in Figs. 2 and L \Vhi1e inthis position the ,movement of the bolt C is freely permitted. 7o Should an attempt be made upon the safe or other lock-up by removing the lock or lockspinrdle in order to pick out thecombination, the lock-bar is at once unseated from the Apoint g of the keeper and dropped into the 7 5 notch g, when the tension of the spring d at once throws the bolt D forward under the lip c of the bolt-C, locking the latter in its raised position, as shown in Fig. l, and thereby effectually preventing the retraction of the bolts 8o after the lock-bolt a is operated.

Vithin an aperture, d2,in thebolt Displaced a pin,cl3, which is normally thrown outward by the tension of a leaf-spring, d, varranged in a recess in said bolt and bearing against the end 8 5 of the pin. The arrangement of parts is such that when the bolt rl is in the position shown in Fig. 2v the pin di is held wholly within the bolt by the rear keeper, 2, against which its l end abuts.V On the other hand,when the bolt 9o D is released in the manner described, and is shot under the lip c of the bolt C, the pin d? emerges from the staple just as the bolt reaches its proper place, and being forced outward by the spring d* it projects from the face ofthe bolt 9 5 just in front of the edge of the staple,where it offers an insurmountable barrier to the operation of the bolts.

Itis well-known that it is a frequent occurrence for bank-vaults, safes, 8vo., to be forced roo by removing the lock and'lock-spindle, or by drilling holes in front of the lock, so that a burglar may insertan instrument or a wire and pick up the combination of the lock, so that the dog will drop in place when by moving the tumbler the lock-bolt is turned, so that the bolt connecting with the bolt-Work may drop into its opening. After this is aecom- 'plished the door is readily opened by merely throwing back the bolts. By my invention, however, this method of forcing such lock-outs is effectually prevented.

It will readily be seen that instead of attaching the lock-bar E to the lock-spindle it may be connected with any part of the lock which would be removed in forcing the vault or safe.

The bolt C, instead of having a lip, c, may be provided with a recess to receive the bolt D.

The object of my lock attachment is to attach it to all lock and bolt spindles at present used in `vaults and safes or that may hereafter be in use.

' Having thus described my inventioinwhat I claim isl. The combination, with the bolts and bolt- Work of a safe, vault, or other lock-up, of a vertically-reciprocating lipped or recessed bolt actuated by the movement of the locking-bolts, a spring-actuated safety-bolt adapted to engage with the latter, a detachable lock-bar connected With said bolt and with the lock-spindle, and a notched keeper against which said lockbar rests, thereby holding' the safety-bolt out of engagement with the lipped bolt, substantially as described.

2. The combination, in a safe or vault lock, of the locking-bolts, the bolt-Work, the vertically-sliding lipped bolt connected with and actuated by t-he bolt-Work, the horizontallysliding safety bolt, the guide-staple for the latter, a pin arranged in an aperture in the safety-bolt and normally projected by a spring grooved nut secured on the said projecting end of the spindle, the lock-bar having its lower endforked and engaging the nut, asafety-bolt connected with the upper end of the lock-bar, a vertically-sliding lipped'bolt, and thc bolt- Work connected with and actuating the vertically-sliding bolt, substantially as described.

5.` The combination, with the lock A, having spindle aand keeper G, of the lock-barE, the safety-bolt D, having spring d', the lipped bolt C, bell-crank b', and bolts B', substantially as described.

6. The combination of the locking-bolts of a safe or vault, the bolt-Work, a vertically-sliding lipped bolt connected with and actuated by the bolt-work, a sliding safety-bolt, a lock-bar connected with the latter and with the spindle of the lock, and means for holding the safetybolt in engagement with the lipped bolt, and thereby preventing the movement of the bolt- Work, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN ',li. HOUGH. \Vit11esses:

-JoHN C. CUMAUNGS,

M. D. fname 

